The activation polarization is illustrated by the image below. To calculate activation polarization, three essential parameters are needed and these parameters are Constant for the Half Cell (β), Constant for the Half Cell (io) and Current per Unit Density (i).
The formula for calculating activation polarization:
ηa = ±β log(i/io)
Where:
ηa = Activation Polarization
β = Constant for the Half Cell
io = Constant for the Half Cell
i = Current per Unit Density
Let’s solve an example;
Find the activation polarization when the constant for the half cell is 10, the constant for the half cell is 5 and the current per unit density is 20.
This implies that;
β = Constant for the Half Cell = 10
io = Constant for the Half Cell = 5
i = Current per Unit Density = 20
ηa = ±β log(i/io)
ηa = ±(10) log(20/5)
That is, ηa = ±(10) log(4)
ηa = ±(10) (0.6020)
ηa = ±6.020
Therefore, the activation polarization is ±6.020.
Read more:Â How to Calculate and Solve for Concentration Polarization | Corrosion
How to Calculate Activation Polarization With Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the activation polarization.
To get the answer and workings of the activation polarization using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
Master Every Calculation Instantly
Unlock solutions for every math, physics, engineering, and chemistry problem with step-by-step clarity. No internet required. Just knowledge at your fingertips, anytime, anywhere.
To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.
Now, Click on Corrosion under Materials and Metallurgical
Now, Click on Activation Polarization under Corrosion
The screenshot below displays the page or activity to enter your values, to get the answer for the activation polarization according to the respective parameter which is the Constant for the Half Cell (β), Constant for the Half Cell (io) and Current per Unit Density (i).
Now, enter the values appropriately and accordingly for the parameters as required by the Constant for the Half Cell (β) is 10, Constant for the Half Cell (io) is 5 and Current per Unit Density (i) is 20.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the activation polarization and presents the formula, workings and steps too.
